condition mean min max ZT0-3 51.82325 51.82325 51.82325 ZT4-7 34.89275 34.89275 34.89275 ZT8-11 37.5647 37.5647 37.5647 ZT12-15 65.88775000000001 65.88775000000001 65.88775000000001 ZT16-19 65.35035 65.35035 65.35035 ZT20-23 67.12695 67.12695 67.12695